ZyXEL Communications P-793H User Manual
Chapter 30 Filter Configuration
P-793H User’s Guide
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Figure 195 Example Filter: Menu 21.1.3.1
The port number for the telnet service (TCP protocol) is 23. See RFC 1060 for port numbers of
well-known services.
When you press [ENTER] to confirm, you will see the following screen. Note that there is
only one filter rule in this set.
well-known services.
When you press [ENTER] to confirm, you will see the following screen. Note that there is
only one filter rule in this set.
Figure 196 Example Filter Rules Summary: Menu 21.1.3
This shows you that you have configured and activated (A = Y) a TCP/IP filter rule (Type =
IP, Pr = 6) for destination telnet ports (DP = 23).
M = N means an action can be taken immediately. The action is to drop the packet (m = D) if
the action is matched and to forward the packet immediately (n = F) if the action is not
matched no matter whether there are more rules to be checked (there aren’t in this example).
After you’ve created the filter set, you must apply it.
IP, Pr = 6) for destination telnet ports (DP = 23).
M = N means an action can be taken immediately. The action is to drop the packet (m = D) if
the action is matched and to forward the packet immediately (n = F) if the action is not
matched no matter whether there are more rules to be checked (there aren’t in this example).
After you’ve created the filter set, you must apply it.
1 Enter 11 from the main menu to go to menu 11.
2 Enter 1 or 2 to open Menu 11.x - Remote Node Profile.
3 Go to the Edit Filter Sets field, press [SPACE BAR] to select Yes and press [ENTER].
4 This brings you to menu 11.1.4. Apply a filter set (our example filter set 3) as shown in
2 Enter 1 or 2 to open Menu 11.x - Remote Node Profile.
3 Go to the Edit Filter Sets field, press [SPACE BAR] to select Yes and press [ENTER].
4 This brings you to menu 11.1.4. Apply a filter set (our example filter set 3) as shown in
Menu 21.1.3.1 - TCP/IP Filter Rule
Filter #: 3,1
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6 IP Source Route= No
Destination: IP Addr=
IP Mask=
Port #= 23
Port # Comp= Equal
Source: IP Addr=
IP Mask=
Port #=
Port # Comp= None
TCP Estab= No
More= No Log= None
Action Matched= Drop
Action Not Matched= Forward
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6 IP Source Route= No
Destination: IP Addr=
IP Mask=
Port #= 23
Port # Comp= Equal
Source: IP Addr=
IP Mask=
Port #=
Port # Comp= None
TCP Estab= No
More= No Log= None
Action Matched= Drop
Action Not Matched= Forward
Menu 21.1.3 - Filter Rules Summary
# A Type Filter Rules M m n
- - ---- --------------------------------------------------------------- -
1 Y IP Pr=6, SA=0.0.0.0, DA=0.0.0.0, DP=23 N D F
2 N
3 N
4 N
5 N
6 N
- - ---- --------------------------------------------------------------- -
1 Y IP Pr=6, SA=0.0.0.0, DA=0.0.0.0, DP=23 N D F
2 N
3 N
4 N
5 N
6 N